Sta-Rite (Max-E-Pro) Pump Seal Plate Replacement O-Ring (35505-0422) (U9-228) (U9-228A) (0-240) Sta-Rite Max-E-Pro Pump Seal Plate Replacement O-Ring Also fits: (35505-0422) (U9-228) (U9-228A) (0-240) Quality replacement part by TORK Distributors